I would like to compile a list of the trading products that allow end users to program trading models OR other features into the product. TradeStation is a prime example of a product that uses custom programming code to allow it's end users to do something different than what the program initial came with. RealTick would be another as it allows users to interact via Excel or by creating custom technical studies. What other market data/trading products allow custom programming or software manipulation of some kind? Sincerely, Greg Davis ProTradeFinancial.com